世界森林生态系统包括热带、亚热带、温带森林，北方针叶林以及其他有林地。
World forest Ecosystem includes tropical, subtropical, temperate, and boreal forests as well as other woodland.
柑桔是世界最重要的经济作物之一，在热带和亚热带地区广泛栽培。
Citrus is one of the most important fruit tree crops and widely cultivated in the tropical and subtropical areas in the world.
炭疽病是世界性的植物病害，对许多作物构成严重威胁，尤其在热带、亚热带地区。
Anthracnose is one of the most important plant diseases worldwide, which could seriously infect many crops, especially in tropical and subtropical regions.
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